/*
 * Copyright (c) 2023 unknowIfGuestInDream.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *     * Neither the name of unknowIfGuestInDream, any associated website, nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL UNKNOWIFGUESTINDREAM BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.tlcsdm.core.freemarker.template;

import com.tlcsdm.core.javafx.util.OSUtil;
import freemarker.cache.ClassTemplateLoader;
import org.apache.commons.io.input.UnixLineEndingInputStream;
import org.apache.commons.io.input.WindowsLineEndingInputStream;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;

/**
 * This class is the extension of ClassTemplateLoader override the getReader()
 * function
 *
 * @author unknowIfGuestInDream
 */
public class FitClassTemplateLoader extends ClassTemplateLoader {
    public FitClassTemplateLoader(Class<?> clazz, String path) {
        super(clazz, path);
    }

    @Override
    public Reader getReader(Object templateSource, String encoding) throws IOException {
        if (templateSource != null) {
            String temp = templateSource.toString();
            URL url = new URL(temp);
            return new InputStreamReader(wrapInLineEndingInputStream(url.openStream()), encoding);
        } else {
            return null;
        }
    }

    private InputStream wrapInLineEndingInputStream(InputStream toWrap) {
        if (OSUtil.OS.WINDOWS.equals(OSUtil.getOS())) {
            return new WindowsLineEndingInputStream(toWrap, false);
        } else {
            return new UnixLineEndingInputStream(toWrap, false);
        }
    }
}
